Telefunken
Short Circuit / Earth Leakage in Microwave
Microwave trips the household circuit breaker or RCD when starting a heating cycle.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Shorted high-voltage capacitor, Shorted high-voltage diode, Faulty line filter causing leakage to ground, Damaged power cord insulation
How to Fix / Troubleshooting
Safety first: Do not repeatedly reset the breaker; this can be dangerous. Unplug the microwave.
- Check for obvious damage: Inspect the power cord and plug for burns or cuts. Replace if damaged.
- Try a different outlet: Plug into another properly grounded outlet on a different circuit to rule out wiring issues in the home.
- Internal inspection (for trained persons): Remove the cover and inspect the line filter, HV capacitor, and diode for burn marks or cracks.
- Component replacement: Replace any shorted components with Telefunken-compatible parts. If unsure, contact an authorized service center.
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Repair Difficulty
Professional Required
5/5
Required Part
High-Voltage Capacitor
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